{
  config,
  pkgs,
  ...
}: {
  programs.zsh = rec {
    enable = true;

    autocd = true;
    defaultKeymap = "emacs";
    dotDir = ".config/zsh";
    enableAutosuggestions = true;
    enableCompletion = true;
    enableSyntaxHighlighting = true;
    enableVteIntegration = true;

    initExtraBeforeCompInit = ''
      fpath+=(${config.home.profileDirectory}/share/zsh/site-functions)
    '';

    history = {
      path = "$HOME/.local/zsh/history";
      extended = true;
      ignoreDups = true;
    };

    historySubstringSearch.enable = true;

    loginExtra =
      /*
      sh
      */
      ''
        export GPG_TTY=$(tty)

        if [ -n "$INSIDE_EMACS" ]; then
            chpwd() {
                print -P "\032/$(pwd)"
            }
        fi


        function s() {
            ${shellAliases.web} "https://google.com/search?q=$(echo $@ | sed -e 's/ /%20/g')"
        }

        nixifypy() {
          if [ ! -e ./.envrc ]; then
            echo "use nix" > .envrc
            direnv allow
          fi
          if [[ ! -e shell.nix ]] && [[ ! -e default.nix ]]; then
            cat > default.nix <<'EOF'
        with import <nixpkgs> {};
        mkShell {
          nativeBuildInputs = [
            bashInteractive
            (pkgs.python310.withPackages (p: with p; [  ]))
          ];
        }
        EOF
            ${config.home.sessionVariables.EDITOR} default.nix
          fi
        }

        flakify() {
          if [ ! -e flake.nix ]; then
            nix flake new -t github:nix-community/nix-direnv .
          elif [ ! -e .envrc ]; then
            echo "use flake" > .envrc
            direnv allow
          fi
          ${config.home.sessionVariables.EDITOR} flake.nix
        }
      '';

    localVariables = {
      PROMPT = "\n%B%F{blue}%~\n%F{green}$ %f%b";
      RPROMPT = "%B%F{red}%*%f%b";
    };

    shellAliases =
      rec {
        cd = "z";
        discord = "${web} https://discord.com/channels/@me";
        dotd = "cd ${config.home.sessionVariables.DOTDIR} ";
        e = "emacsclient -c -nw";
        em = "emacs -nw";
        email = "${ew} -n --eval '(mu4e)'";
        emw = "emacs";
        ew = "emacsclient -c -n";
        getmail = "${pkgs.offlineimap}/bin/offlineimap -f INBOX";
        l = "ls -1";
        np = "nix-shell -p";
        org = "cd ${config.home.sessionVariables.ORGDIR} ";
        spotify = "${web} https://open.spotify.com/";
        ubc = "cd ${config.home.sessionVariables.UBCDIR} ";
        ubcmail = "${web} https://webmail.student.ubc.ca";
        web = "${config.programs.firefox.package}/bin/firefox";
      }
      // (
        if pkgs.stdenv.isLinux
        then {
          nbs = "sudo nixos-rebuild build --flake ${config.home.sessionVariables.DOTDIR}#";
          nrs = "sudo nixos-rebuild switch --flake ${config.home.sessionVariables.DOTDIR}#";
        }
        else {}
      );
  };
}